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• W1963506688 abstract "In noisy seismogram, it is very difficult to determine the arrival time of various phases like, P and S. However, as the seismic signals are non-stationary in nature analysing seismogram in time-frequency representation can give the location of P,S-wave with high accuracy. For exact location, higher time and frequency resolution is required and hence, needs a method which can provide enhanced energy concentration in the time-frequency domain. In past few years, S-transform has become a popular tool for analysis of time-frequency distribution of seismic signals. The method provides multi-resolution analysis while retaining the absolute phase information of each frequency component of the signal, and hence is superior to others like Short Time Fourier Transform (STFT), Continuous Wavelet transform (CWT). The S-transform is considered conceptually a hybrid of STFT and CWT. Standard S-transform technique has frequency dependent window,so it has some limitations as frequency resolution will be poor at high frequency and degradable time resolution at low frequency. In this paper, we analyse the noisy seismogram in the time-frequency plane using modified S-transform technique in which window consists of additional parameters which controls the scale and shape of window in such a way as to provide improved energy concentration of spectrum." @default.
• W1963506688 created "2016-06-24" @default.
• W1963506688 creator A5021363547 @default.
• W1963506688 date "2014-01-01" @default.
• W1963506688 modified "2023-09-27" @default.
• W1963506688 title "Time-frequency Analysis of Noisy Seismogram Using Modified S-transform" @default.
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• W1963506688 doi "https://doi.org/10.3997/2214-4609.20140958" @default.
• W1963506688 hasPublicationYear "2014" @default.
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